<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script>
    //    var a=0
    //    while(true){
    //     a++;
    //     if(a%5==0&&a%6==1)
    //     break;
    //    }
    //    console.log(a);
    for(var i=30;i>5;i-=7){
        console.log(i--);
    }
    </script>
</head>
<body>
    
</body>
</html>